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In mammals and birds why is it necessary to separate oxygenated and de-oxygenated blood |
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Answer» Ask from birds teacher Body temperature maintain kerne ke liye aur each cells ko o 2 chaahiye hamhe o2 ki jayada jaroorat padti hai ager hamhe baghnaan ne 4 chambemred heart diya hai to hoga hi ager 2 chambered doya hota to nahi tha necessary |
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